From: David Miller <davem@davemloft.net>
To: paulmck@linux.vnet.ibm.com
Cc: mroos@linux.ee, shemminger@vyatta.com,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: suspicious RCU usage warnings in 3.3.0
Date: Fri, 13 Apr 2012 10:55:56 -0400 (EDT) [thread overview]
Message-ID: <20120413.105556.73360716787161031.davem@davemloft.net> (raw)
In-Reply-To: <20120413133513.GB2457@linux.vnet.ibm.com>
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Date: Fri, 13 Apr 2012 06:35:13 -0700
DANGER WILL ROBINSON, McKenney is hacking sparc64 assembler!
:-))))
> My main concern about my patch is my removal of this line:
>
> bne,pn %icc, __handle_softirq
>
> It is quite possible that this should instead change to look as follows:
>
> bne,pn %icc, __handle_preemption
>
I would say it should not, because the __handle_softirq code path,
if taken, unconditionally branches to the very next instruction
after this branch and it's delay slot.
> Anyway, patch with updated changelog below.
Great work, I'll apply this after I test it out a bit myself.
Thanks a lot Paul!
next prev parent reply other threads:[~2012-04-13 14:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-28 8:45 suspicious RCU usage warnings in 3.3.0 Meelis Roos
2012-03-28 21:45 ` David Miller
2012-04-11 15:08 ` Meelis Roos
2012-04-11 23:08 ` Paul E. McKenney
2012-04-12 0:10 ` Stephen Hemminger
2012-04-12 0:18 ` David Miller
2012-04-12 0:45 ` Paul E. McKenney
2012-04-12 1:03 ` David Miller
2012-04-12 1:53 ` Paul E. McKenney
2012-04-12 1:08 ` David Miller
2012-04-12 4:54 ` Paul E. McKenney
2012-04-13 11:55 ` mroos
2012-04-13 13:35 ` Paul E. McKenney
2012-04-13 14:55 ` David Miller [this message]
2012-04-13 16:30 ` Paul E. McKenney
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